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Automated cortical thickness and skewness feature selection in bipolar disorder using a semi-supervised learning method.

Abstract：

BACKGROUND:Bipolar disorder (BD) broadly affects brain structure, in particular areas involved in emotion processing and cognition. In the last years, the psychiatric field's interest in machine learning approaches has been steadily growing, thanks to the potentiality of automatically discriminating patients from healthy controls. METHODS:In this work, we employed cortical thickness of 58 regions of interest obtained from magnetic resonance imaging scans of 41 BD patients and 34 healthy controls, to automatically identify the regions which are mostly involved with the disease. We used a semi-supervised method, addressing the criticisms on supervised methods, related to the fact that the diagnosis is not unaffected by uncertainty. RESULTS:Our results confirm findings in previous studies, with a classification accuracy of about 75% when mean thickness and skewness of up to five regions are considered. We obtained that the parietal lobe and some areas in the temporal sulcus were the regions which were the most involved with BD. LIMITATIONS:The major limitation of our work is the limited size or our dataset, but in line with other recent machine learning works in the field. Moreover, we considered chronic patients, whose brain characteristics may thus be affected. CONCLUSIONS:The automatic selection of the brain regions most involved in BD may be of great importance when dealing with the pathogenesis of the disorder. Our method selected regions which are known to be involved with BD, indicating that damage to the identified areas can be considered as a marker of disease.

journal_name

J Affect Disord

journal_title

Journal of affective disorders

authors

Squarcina L,Dagnew TM,Rivolta MW,Bellani M,Sassi R,Brambilla P

doi

10.1016/j.jad.2019.06.019

subject

Has Abstract

pub_date

2019-09-01 00:00:00

pages

416-423

eissn

0165-0327

issn

1573-2517

pii

S0165-0327(19)30222-8

journal_volume

256

pub_type

杂志文章

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